Apologies in advance for the low effort post. It was suggested here on FT that I could consider starting a thread for ideas but if this is too "lazy" then I'll try to find more time in my hectic schedule to put more work in first.

Mr and Mrs 40love are middled aged, still physically healthy and fit thankfully, and are planning to spend 10 days in China (TWOV). The easiest way to configure the TWOV trip was to fly into PVG, and we have 10 days to exit to HK which was the next planned destination. We also wish to keep the last 2-3 days of the itinerary open to the possibility of someone taking us around to a former village in Guangdong where we have some family roots.

So far this is what the itinerary looks like:

Day 0 - arrive in PVG
???
West Lake/Xihu, Hangzhou
???
Day 7 or 8 Shenzhen (reserving possibility of a Guangdong tour that replaces Shenzhen)
Day 9 or 10 - leave for HK depending on other circumstances

We really know nothing about China at all. It would have been nice to see the Great Wall and some other famous sites but it seems most of that is much further North. It would be great to get any suggestions as to ways to fill our itinerary (along with any good value/well positions hotels too - bearing in mind that we are normally budget travellers, but will look to splash out a little on ourselves during this trip).

Thanks in advance!

PS - perhaps as a guide to what sort of things we typically do, we recently went to Japan and our itinerary included Tokyo viral/cliche city locations, Metropolitan Government Tower, National Museum, Art Museum, Kyoto Fushimi Inara Taisha shrine, Nishiki Market, Nara Park, Osaka day trip only/Glico running man sign, Hiroshima Peace Park and Museum, and side trip to Miyajima Island.